We'll be in London for 3 days, and I'm confused about the Oyster Cards. First, the OCs are better than pay as you go, right? If not, please let me know. I know DSs 10 and 7 ride for free, and DS 12 qualifies for a discounted rate. But do they need photo cards? Because I've waited too long to apply now...I don't have the necessary 3 weeks to process the photo application.
I'm not sure how to navigate all of this - help!
Thanks.